Reply To: Increase the add to cart button size

Hello,

Please replace all the code provided above with this one:

.single-product-page.product-type-simple form.cart,
.woocommerce-variation-add-to-cart {
  display: flex;
}
.single-product-page.product-type-simple form.cart > button,
.woocommerce-variation-add-to-cart > button {
  flex-grow: 1;
}

Please add this code to the Theme Settings > Custom CSS > Desktop/Tablet/Landscape

Do not insert into Global and Mobile.

Best Regards